Timer atkinson



'0.115. DANIELS.

` l Car Spring.`

No. 78,191. Pamed May 26, 1868,

n hiess e s f D. G. DANIELS, OF CINCINNATI; OHIO, 4ASSIGI\I()R TO-HIMSELF AND F. MOR- l TIMER ATKINSON, OF CHICAGO, ILLINOIS.

Lean-s Parentlvo. 78,191, dans May 2c, isos.

@La tlgetrle referrer in im 1pts teitets tant mit uniting part nf tttsante.

TO ALL WHOM IT MAY CONCERN: y

Be it known tliat' I, D. G. DANIELS, of Cincinnati, in the county ofHamilton, and State of Ohio, havcf invented a new'and improved Spring;and I do hereby/declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,making part of this specification, in which- Figure lis a diametricalsection through one of the springs.

Figure 2 is atop View ofthe spring.

Figure 3 is a. diametrical section of the spring when partly compressed.

' Figure 4 is an end View of the spring 4 Figures 5 and 6 show themanner of piling a number of the improved springs.`

Similar letters of reference indicate corresponding parts in the severalfigures.

This'invention relates to a new and improved method of manufacturingsprings for railroad-cars, and other i purposes, whereby a very simpleyand elicient spring can be made, which will retain its elasticproperties unimpaired for a considerable length of time, and which willoccupy a very small space, and admit of being employed Y for draw-bars,box-springs, and for other like purposes.' Y

The nature of my invention consists in constructing a spring of twocircular plates of steel, bent in the form of a segment of a cylinder,and put together, at right angles to each other, in such manner that thecircumferential edges' of. such plates shall touch, and-thereby afford acontinuous circular impingement, and a uniform distribution ofresistance over the entire area of both plates, when they are subjectedto pressure, as will be hereinafter described. I

To enable others skilled in the art to understand-my invention, I willdescribe its construction and operation.

In the accompanying drawings,"gs. 1, 2, 3, and 4, Ifhave represented theimproved spring, separated from its gang or pile, and in figs. 5 and 6,I have shown the method of piling a number of the springs together.

Each spring is composed of two platesiof steel, A A, made exactly alike,and put together so that they bear or touch only at theircircumferential edges. These two plates A are stamped out of a. sheet ofsteel or other suitable springy metal, and they are made of a circularlshape, and of equal diameter. They are then4 bent over the surface of aformer, so as to give them the shape ofisegmernts of a cylinder.. i Theplates thus produced are punched, so as to leave holes, a a, throughtheir centres, iisuch holes are-required, after which they are temperedin the well-known manner of tempering springs. Bothplates being of anequal size, and having the same curvature, they can be iitted. togetherin the manner shown in the drawings, so that their outer! edges willimpinge all around, and leave a space between the plates within theseimpinging edges.

Each plate A is bent in'a direction with-the length of the grain of themetal, so that when the plates are under compression, there will'be notendency to split or impair the metal, and the lateral spreading andretraction of one ofthe plates will be at right vangles to such movementgiven to the other plate, when exposedto compression. Y z

I am aware that it is not uew'to make aspring of two circular dishedplates, or plates which are the form of segments of asphere, puttogether so that their circumferential edges only touch. l Such platescannot be "made nor used without injury to the bres of themetal, And Iam also aware that an 'improvementhas been suggested upon the saiddished springs, by corrugating the circular plates radially, or crimpingtheir outer edges, which form,vit has been alleged, would prevent thesplitting of the edges of the dislisby expansion. In the last-mentionedspring, it may be true that the edges of the disks will not split undercompression, but itis obvious that the plates cannot be given thecorrugated form without distorting and seriously injuring the bres ofthe metal. v l

By my invention, I am enabled to construct a spring of two circularplates, of uniform thickness of metal,

and of uniform elasticity, Without in the least impairing any of thefibres, or weakening any portion of the plates. I

i i i February, 1868.

These improved springs may be piled or put together, so as to form a,compound spring, composed of any required number of pairs of plates, asshown in gs. 5 and 6.

In fig. 5, e4 compound spring, es above mentioned, is shown, appliedwithin s. bo'XLB, and kept in place by means of the central rod C. D isa.' follower,` which is holden in place within the'box, B, and preventedfrom being drawn out by means of e nut, g, upon the screw-threaded partot' the rod C. Pressure upon the follower D will be received by all thesprings, which will be Acompressed equally.

I do' not confine my invention to the special arrangement of the springsshown in iig. 5, as they may be arranged in different Ways, according tothe purpose for which they are designed to serve; that is to say, whilemy invention is limited to the use ofV plates which are segments of a.cylinder, andvwhich are arranged upon one another so es to be at rightvangles to each other, and bearv upon one another et every part of theirmargin equally, I do notlimt myself in the application of springs thusmade, but shall apply them to car-bumpers or draw-heads, to cer-trucks,and, in fact, to all purposes where springs are useful'.

Having described my invention, what I claim as'neiv, and desire tosecure ly Letters Patent, is

A spring, which is composed of plates A A, bent in the formof segmentsof e cylinder, and put together et right angles to cach other,substantially-os described.

Witness my hand in the metter of my application for u patent on animproved spring,'this third day of D. Gr'. DANIELS..

Witnesses:

J. A. CLINTON, H. TAYLOR.

